References
The Red Hat customer portal: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/
The Tree Project home page: http://mama.indstate.edu/users/ice/tree/
XFS FAQ: http://xfs.org/index.php/XFS_FAQ
The XFS user guide: http://xfs.org/docs/xfsdocs-xml-dev/XFS_User_Guide//tmp/en-US/html/index.html
The Red Hat XFS guide: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Storage_Administration_Guide/ch-xfs.html
The XFS wiki page: http://en.wikipedia.org/wiki/XFS